Precise-control hydraulic calibration testing device
By using scale marks and contactless Hall sensors in reinforcement tensile testing equipment, the problem of unintuitive detection in the prior art is solved, and accurate monitoring and efficient detection of reinforcement displacement are achieved.
Patent Information
- Application Number
- CN202422113089.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-29
- Publication Date
- 2025-07-01
- Estimated Expiration
- 2034-08-29
AI Technical Summary
When detecting steel bar displacement data, existing reinforcement tensile testing equipment is not intuitive enough, affects the detection efficiency, and lacks accurate monitoring methods.
The scale line is used to combine the non-contact Hall sensor to visually observe the displacement of the steel bars through the scale line. At the same time, the non-contact Hall sensor is used to detect and transmit data to the display control device to generate a curve chart to achieve accurate monitoring.
The detection efficiency and accuracy are improved, and through the combination of scale lines and curve charts, intuitive and rapid monitoring and data transmission of the tensile length of the steel bar are achieved.
Smart Images
Figure CN223051065U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of testing devices, and particularly relates to a precise control hydraulic calibration testing device. Background Technique
[0002] The tensile test of building materials steel bars is an important link to ensure that the quality of steel bars meets the requirements of building design and engineering construction. The main purpose of the tensile test of building materials steel bars is to determine the maximum tensile force that the steel bars can withstand during the tensile process, that is, the tensile strength, and to evaluate its plastic deformation ability, so as to judge whether the steel bars meet the relevant standards and ensure the stability and safety of the building structure. At present, most of the equipment for tensile testing of steel bars is driven by hydraulic cylinders. In the prior art, for the detection of steel bar displacement data, it is generally only simply carried out through displacement sensors. The tensile length data of the steel bars is not intuitive enough, which is not convenient for the staff to quickly observe and affects the detection efficiency. Content of the Utility Model
[0003] Aiming at the above problems, the purpose of the utility model is to provide a precise control hydraulic calibration testing device. The extension displacement of the telescopic rod can be observed through the scale line on the telescopic rod, which is convenient for the staff to visually inspect. At the same time, the non-contact Hall sensor can directly transmit the displacement data of the telescopic rod to the calculation system, and a curve graph can be directly generated on the display control device. Through the combination of the telescopic rod, the scale line and the curve graph, an intuitive and fast display method can be realized, and the detection efficiency can be improved.
[0004] To achieve the above purpose, the utility model provides the following technical solution: a precise control hydraulic calibration testing device, including a test chamber, a hydraulic cylinder mounting seat is installed inside the test chamber, a hydraulic cylinder is installed on one side surface of the hydraulic cylinder mounting seat, a first connecting rod is sleeved outside the piston rod of the hydraulic cylinder, one end of the first connecting rod is connected to a telescopic rod, the telescopic rod passes through the side surface of the test chamber and is slidably connected thereto, a scale line is provided on the outside of the telescopic rod, a second connecting rod is installed on the side surface of the test chamber, one end of the second connecting rod is connected to a collar, a non-contact Hall sensor is installed on the top of the collar, an induction magnet is inlaid and installed on the top of the telescopic rod, a movable first clamping device penetrates and is provided on the left side plate of the test chamber, a fixed second clamping device penetrates and is provided on the right side plate of the test chamber, the side surface of the first clamping device is connected to the piston rod of the hydraulic cylinder, and a hydraulic system is provided inside the test chamber.
[0005] The beneficial effects of the present utility model are as follows: When the device conducts a test, the oil pump is controlled to input the hydraulic oil in the hydraulic oil tank into the linear electromagnetic throttle valve through the first oil inlet and return pipe. After passing through the linear electromagnetic throttle valve, it enters the three-position four-way electromagnetic reversing valve, and then enters the third oil inlet and return pipe through the three-position four-way electromagnetic reversing valve. Finally, it is input into the interior of the hydraulic cylinder through the third oil inlet and return pipe to push the piston rod of the hydraulic cylinder to extend. At the same time, the hydraulic oil at the other end of the piston rod flows back through the fourth oil inlet and return pipe, and after passing through the three-position four-way electromagnetic reversing valve, it flows back into the hydraulic oil tank through the second oil inlet and return pipe. The piston rod of the hydraulic cylinder pushes the mounting cover of the first clamping device to move, thereby driving one end of the steel bar to be stretched. As the steel bar is stretched, the telescopic rod also moves outward with the movement of the piston rod of the hydraulic cylinder. The extension displacement of the telescopic rod can be observed through the scale line on the telescopic rod, which is convenient for the staff to visually inspect. At the same time, the device is also provided with a non-contact Hall sensor and an induction magnet. While the induction magnet moves with the telescopic rod, the non-contact Hall sensor detects the linear change of the magnetic field intensity caused by the movement of the induction magnet to synchronously detect the moving distance of the telescopic rod, and displays the detected data on the display control device. In this way, through the visual direct observation of the scale line and the detection of the displacement distance of the telescopic rod by the non-contact Hall sensor, the accurate monitoring of the displacement of the first clamping device can be achieved, thereby accurately monitoring the stretching length of the steel bar. At the same time, the non-contact Hall sensor can directly transmit the displacement data of the telescopic rod to the calculation system, and a curve graph can be directly generated on the display control device. Through the intuitive and rapid display method of the telescopic rod, scale line and curve graph, the detection efficiency can be improved. Through the setting of the linear electromagnetic throttle valve, the flow rate and flow velocity of the hydraulic oil can be accurately adjusted, thereby accurately adjusting the operating speed and pressure of the hydraulic cylinder to meet the different pressure requirements in different detection stages.
[0006] In order to improve the test safety:
[0007] As a further improvement of the above technical solution: A chamber door is slidably installed on the front surface of the test chamber.
[0008] The beneficial effect of this improvement is that after the chamber door is closed, a closed space is formed inside the test chamber, thereby blocking the fragments generated when the steel bar breaks during the test and improving the test safety.
[0009] In order to clamp and fix the steel bar:
[0010] As a further improvement of the above technical solution: both the first clamping device and the second clamping device include mounting covers. A fixed lower clamping plate is provided inside the mounting cover. A motor is provided inside the mounting cover. The output end of the motor is connected to a screw rod. A guide rail is provided inside the mounting cover. A transmission slider is slidably mounted inside the guide rail. The transmission slider is threadedly connected to the screw rod. The side of the transmission slider is fixed to an upper clamping plate. Clamping grooves are provided at the bottom of the upper clamping plate and the top of the lower clamping plate.
[0011] The beneficial effect of this improvement is that both ends of the steel bar to be tested are respectively placed between the clamping grooves of the lower clamping plate and the upper clamping plate in the first clamping device and the second clamping device. The motor is controlled to drive the screw rod to rotate. The screw rod drives the transmission slider to move downward along the guide rail, driving the upper clamping plate and the lower clamping plate to approach each other, thereby clamping and fixing the steel bar.
[0012] For the control of the hydraulic cylinder:
[0013] As a further improvement of the above technical solution: the hydraulic system includes a hydraulic oil tank. An oil pump is installed on the top of the hydraulic oil tank and is connected to a second oil inlet and return pipe. The output end of the oil pump is connected to a first oil inlet and return pipe. One ends of the second oil inlet and return pipe and the first oil inlet and return pipe are connected to a three-position four-way electromagnetic reversing valve. The middle section of the first oil inlet and return pipe is also connected to a linear electromagnetic throttle valve. The other end of the three-position four-way electromagnetic reversing valve is respectively connected to a third oil inlet and return pipe and a fourth oil inlet and return pipe. The other ends of the third oil inlet and return pipe and the fourth oil inlet and return pipe are connected to the hydraulic cylinder.
[0014] The beneficial effect of this improvement is that during the test, the oil pump is controlled to input the hydraulic oil in the hydraulic oil tank from the first oil inlet and return pipe into the linear electromagnetic throttle valve. After passing through the linear electromagnetic throttle valve, it enters the three-position four-way electromagnetic reversing valve, and then enters the third oil inlet and return pipe through the three-position four-way electromagnetic reversing valve. Finally, it is input into the interior of the hydraulic cylinder through the third oil inlet and return pipe to push the piston rod of the hydraulic cylinder to extend. At the same time, the hydraulic oil at the other end of the piston rod flows back through the fourth oil inlet and return pipe, and flows back into the hydraulic oil tank through the second oil inlet and return pipe after passing through the three-position four-way electromagnetic reversing valve. The piston rod of the hydraulic cylinder drives the mounting cover of the first clamping device to move, thereby driving one end of the steel bar to be stretched. After the tensile test is completed, then the motor is controlled to drive the upper clamping plate to release the clamping of the steel bar. After opening the chamber door and removing the steel bar, the three-position four-way electromagnetic reversing valve can be controlled to change the oil path direction of the hydraulic oil, so that the original oil path where the first oil inlet and return pipe is connected to the third oil inlet and return pipe and the second oil inlet and return pipe is connected to the fourth oil inlet and return pipe is switched to the first oil inlet and return pipe being connected to the fourth oil inlet and return pipe and the second oil inlet and return pipe being connected to the third oil inlet and return pipe, thereby driving the piston rod of the hydraulic cylinder to retract, and the piston rod of the hydraulic cylinder drives the first clamping device to reset.
[0015] For the control of this device:
[0016] As a further improvement of the above technical solution: a display control device is provided on the side of the test chamber.
[0017] The beneficial effect of this improvement is that the display control device is used for the operation interface of this device and the display of detection data, as well as touch operation.
[0018] In order to play a supporting role when the hydraulic cylinder pushes the first clamping device to move:
[0019] As a further improvement of the above technical solution: an auxiliary guiding support sliding rod is connected to the side of the mounting cover of the first clamping device, and a support frame is provided inside the test chamber, and the sliding rod and the support frame are slidably connected.
[0020] The beneficial effect of this improvement is that the support sliding rod slides along with the movement of the first clamping device, and the support frame supports the support sliding rod. The cooperation between the support sliding rod and the support frame plays an auxiliary supporting role for the first clamping device.
[0021] The parts not involved in this device are the same as the prior art or can be implemented by using the prior art. Description of the Drawings
[0022] Figure 1 Isometric structural schematic diagram of the present utility model;
[0023] Figure 2 Cross-sectional schematic diagram of the present utility model;
[0024] Figure 3 Schematic diagram of structures such as the hydraulic cylinder and the telescopic rod in the present utility model;
[0025] Figure 4 Schematic diagram of the structure of the hydraulic system in the present utility model;
[0026] Figure 5 Side cross-sectional structural schematic diagram of the first clamping device in the present utility model;
[0027] Figure 6 Cross-sectional structural schematic diagram of the first clamping device in the present utility model;
[0028] In the figure: 1. Test chamber; 2. Chamber door; 3. Hydraulic cylinder mounting seat; 4. Hydraulic cylinder; 5. First connecting rod; 6. Telescopic rod; 7. Scale line; 8. Second connecting rod; 9. Collar; 10. Non-contact Hall sensor; 11. Inductive magnet; 12. First clamping device; 13. Second clamping device; 14. Mounting cover; 15. Lower clamping plate; 16. Motor; 17. Screw; 18. Driving slider; 19. Upper clamping plate; 20. Clamping groove; 21. Hydraulic oil tank; 22. First oil inlet and return pipe; 23. Second oil inlet and return pipe; 24. Oil pump; 25. Three-position four-way electromagnetic directional control valve; 26. Linear electromagnetic throttle valve; 27. Guide rail; 28. Display control device; 29. Third oil inlet and return pipe; 30. Fourth oil inlet and return pipe; 31. Support slide bar; 32. Support frame. Detailed implementation manners
[0029] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be described in detail below with reference to the accompanying drawings. The description in this part is only exemplary and explanatory, and should not have any restrictive effect on the protection scope of the present invention.
[0030] As Figures 1-6 shown, the precision control hydraulic calibration test device includes a test chamber 1. A hydraulic cylinder mounting seat 3 is installed inside the test chamber 1. A hydraulic cylinder 4 is installed on one side surface of the hydraulic cylinder mounting seat 3. A first connecting rod 5 is sleeved outside the piston rod of the hydraulic cylinder 4. One end of the first connecting rod 5 is connected to a telescopic rod 6. The telescopic rod 6 penetrates through the side surface of the test chamber 1 and is slidably connected thereto. Scale lines 7 are provided outside the telescopic rod 6. A second connecting rod 8 is installed on the side surface of the test chamber 1. One end of the second connecting rod 8 is connected to a collar 9. A non-contact Hall sensor 10 is installed on the top of the collar 9. An inductive magnet 11 is inlaid and installed on the top of the telescopic rod 6. A movable first clamping device 12 penetrates through the left side plate of the test chamber 1, and a fixed second clamping device 13 penetrates through the right side plate of the test chamber 1. The side surface of the first clamping device 12 is connected to the piston rod of the hydraulic cylinder 4. A hydraulic system is provided inside the test chamber 1.
[0031] When the device is tested, the control oil pump 24 inputs the hydraulic oil in the hydraulic oil tank 21 into the linear electromagnetic throttle valve 26 through the first oil inlet and return pipe 22, enters the three-position four-way electromagnetic reversing valve 25 after passing through the linear electromagnetic throttle valve 26, and enters the third oil inlet and return pipe 29 through the three-position four-way electromagnetic reversing valve 25. Finally, it is input into the interior of the hydraulic cylinder 4 through the third oil inlet and return pipe 29 to push the piston rod of the hydraulic cylinder 4 to extend. At the same time, the hydraulic oil at the other end of the piston rod flows back through the fourth oil inlet and return pipe 30, and flows back into the hydraulic oil tank 21 through the second oil inlet and return pipe 23 after passing through the three-position four-way electromagnetic reversing valve 25. The piston rod of the hydraulic cylinder 4 pushes the mounting cover 14 of the first clamping device 12 to move, thereby driving one end of the steel bar to be stretched. As the steel bar is stretched, the telescopic rod 6 also moves outward with the movement of the piston rod of the hydraulic cylinder 4. The extension displacement of the telescopic rod 6 can be observed through the scale line 7 on the telescopic rod 6. At the same time, the device is also provided with a non-contact Hall sensor 10 and an induction magnet 11. While the induction magnet 11 moves with the telescopic rod 6, the non-contact Hall sensor 10 detects the linear change of the magnetic field intensity caused by the movement of the induction magnet 11 to synchronously detect the moving distance of the telescopic rod 6, and displays the detection data on the display control device 28. In this way, through the visual direct observation of the scale line 7 and the detection of the displacement distance of the telescopic rod 6 by the non-contact Hall sensor 10, the precise monitoring of the displacement of the first clamping device 12 can be achieved, thereby accurately monitoring the stretching length of the steel bar. At the same time, the non-contact Hall sensor 10 can directly transmit the displacement data of the telescopic rod 6 to the calculation system, improving the detection efficiency. Through the setting of the linear electromagnetic throttle valve 26, the flow rate and flow velocity of the hydraulic oil can be precisely adjusted, thereby precisely adjusting the operating speed and pressure of the hydraulic cylinder 4 to meet the different pressure requirements in different detection stages.
[0032] A chamber door 2 is slidably installed on the front surface of the test chamber 1.
[0033] After the chamber door 2 is closed, a closed space is formed inside the test chamber 1, thereby blocking the fragments generated when the steel bar breaks during the test and improving the test safety.
[0034] Both the first clamping device 12 and the second clamping device 13 include a mounting cover 14. A fixed lower clamping plate 15 is provided inside the mounting cover 14. A motor 16 is provided inside the mounting cover 14. The output end of the motor 16 is connected to a screw rod 17. A guide rail 27 is provided inside the mounting cover 14. A transmission slider 18 is slidably installed inside the guide rail 27. The transmission slider 18 is threadedly connected to the screw rod 17. The side surface of the transmission slider 18 is fixed to an upper clamping plate 19. Clamping grooves 20 are provided at the bottom of the upper clamping plate 19 and the top of the lower clamping plate 15.
[0035] Both ends of the steel bar to be tested are respectively placed between the clamping grooves 20 of the lower clamping plates 15 and the upper clamping plates 19 in the first clamping device 12 and the second clamping device 13. Then, control the motor 16 to drive the screw rod 17 to rotate. By driving the transmission slider 18 to move downward along the guide rail 27 with the screw rod 17, drive the upper clamping plate 19 to approach the lower clamping plate 15, so as to clamp and fix the steel bar.
[0036] The hydraulic system includes a hydraulic oil tank 21. A hydraulic pump 24 is installed on the top of the hydraulic oil tank 21 and is connected with a second oil inlet and return pipe 23. The output end of the hydraulic pump 24 is connected with a first oil inlet and return pipe 22. One end of the second oil inlet and return pipe 23 and the first oil inlet and return pipe 22 is connected with a three-position four-way electromagnetic reversing valve 25. The middle section of the first oil inlet and return pipe 22 is also connected with a linear electromagnetic throttle valve 26. The other end of the three-position four-way electromagnetic reversing valve 25 is respectively connected with a third oil inlet and return pipe 29 and a fourth oil inlet and return pipe 30. The other ends of the third oil inlet and return pipe 29 and the fourth oil inlet and return pipe 30 are connected with a hydraulic cylinder 4.
[0037] When conducting the test, control the hydraulic pump 24 to input the hydraulic oil in the hydraulic oil tank 21 into the linear electromagnetic throttle valve 26 through the first oil inlet and return pipe 22. After passing through the linear electromagnetic throttle valve 26, it enters the three-position four-way electromagnetic reversing valve 25, and then enters the third oil inlet and return pipe 29 through the three-position four-way electromagnetic reversing valve 25. Finally, it is input into the interior of the hydraulic cylinder 4 through the third oil inlet and return pipe 29 to push the piston rod of the hydraulic cylinder 4 to perform an extending action. At the same time, the hydraulic oil at the other end of the piston rod flows back through the fourth oil inlet and return pipe 30, and flows back into the hydraulic oil tank 21 through the second oil inlet and return pipe 23 after passing through the three-position four-way electromagnetic reversing valve 25. The piston rod of the hydraulic cylinder 4 drives the mounting cover 14 of the first clamping device 12 to move, thereby driving one end of the steel bar to be stretched. After completing the tensile test, then control the motor 16 to drive the upper clamping plate 19 to release the clamping of the steel bar. After opening the chamber door 2, remove the steel bar. Then, it is possible to control the three-position four-way electromagnetic reversing valve 25 to change the oil circuit direction of the hydraulic oil, so that the original oil circuit where the first oil inlet and return pipe 22 is connected to the third oil inlet and return pipe 29 and the second oil inlet and return pipe 23 is connected to the fourth oil inlet and return pipe 30 is switched to the first oil inlet and return pipe 22 being connected to the fourth oil inlet and return pipe 30 and the second oil inlet and return pipe 23 being connected to the third oil inlet and return pipe 29, thereby driving the piston rod of the hydraulic cylinder 4 to perform a retracting action, and making the piston rod of the hydraulic cylinder 4 drive the first clamping device 12 to reset.
[0038] A display control device 28 is provided on the side of the test chamber 1.
[0039] The display control device 28 is used for the operation interface of this device and the display of detection data, as well as touch operation.
[0040] The side of the mounting cover 14 of the first clamping device 12 is connected with an auxiliary guiding support sliding rod 31, and a support frame 32 is arranged inside the test chamber 1, and the support sliding rod 31 and the support frame 32 are slidably connected.
[0041] The support sliding rod 31 slides along with the movement of the first clamping device 12, and the support frame 32 supports the support sliding rod 31. The cooperation between the support sliding rod 31 and the support frame 32 plays an auxiliary supporting role for the first clamping device 12.
[0042] Working principle and usage process of the utility model: When this device is in use, open the bin door 2, place both ends of the steel bar to be tested between the clamping grooves 20 of the lower clamping plates 15 and the upper clamping plates 19 in the first clamping device 12 and the second clamping device 13 respectively, and control the motor 16 to drive the screw rod 17 to rotate. Drive the transmission slider 18 to move downward along the guide rail 27 through the screw rod 17, drive the upper clamping plate 19 to approach the lower clamping plate 15, so as to clamp and fix the steel bar. After closing the bin door 2, the tensile test of the steel bar can be started. When conducting the test, control the oil pump 24 to input the hydraulic oil in the hydraulic oil tank 21 from the first oil inlet and return pipe 22 into the linear electromagnetic throttle valve 26. After passing through the linear electromagnetic throttle valve 26, it enters the three-position four-way electromagnetic reversing valve 25, and enters the third oil inlet and return pipe 29 through the three-position four-way electromagnetic reversing valve 25. Finally, it is input into the interior of the hydraulic cylinder 4 through the third oil inlet and return pipe 29 to push the piston rod of the hydraulic cylinder 4 to extend. At the same time, the hydraulic oil at the other end of the piston rod flows back through the fourth oil inlet and return pipe 30, and flows back into the hydraulic oil tank 21 through the second oil inlet and return pipe 23 after passing through the three-position four-way electromagnetic reversing valve 25. The piston rod of the hydraulic cylinder 4 pushes the mounting cover 14 of the first clamping device 12 to move, so as to drive one end of the steel bar to be stretched. As the steel bar is stretched, the telescopic rod 6 also moves outward with the movement of the piston rod of the hydraulic cylinder 4. The extension displacement of the telescopic rod 6 can be observed through the scale line 7 on the telescopic rod 6. At the same time, this device is also provided with a non-contact Hall sensor 10 and an induction magnet 11. While the induction magnet 11 moves with the telescopic rod 6, the non-contact Hall sensor 10 detects the linear change of the magnetic field intensity caused by the movement of the induction magnet 11 to synchronously detect the moving distance of the telescopic rod 6, and displays the detection data on the display control device 28. In this way, through the visual direct observation of the scale line 7 and the detection of the displacement distance of the telescopic rod 6 by the non-contact Hall sensor 10, the precise monitoring of the displacement of the first clamping device 12 can be achieved, so as to precisely monitor the tensile length of the steel bar. At the same time, the non-contact Hall sensor 10 can directly transmit the displacement data of the telescopic rod 6 to the calculation system to improve the detection efficiency. Through the setting of the linear electromagnetic throttle valve 26, the flow rate and flow velocity of the hydraulic oil can be precisely adjusted, so as to precisely adjust the operating speed and pressure of the hydraulic cylinder 4, and meet the different pressure requirements in different detection stages. After completing the tensile test, then control the motor 16 to drive the upper clamping plate 19 to release the clamping of the steel bar. After opening the bin door 2 and removing the steel bar, the three-position four-way electromagnetic reversing valve 25 can be controlled to change the oil path direction of the hydraulic oil, so that the original oil path where the first oil inlet and return pipe 22 is connected to the third oil inlet and return pipe 29 and the second oil inlet and return pipe 23 is connected to the fourth oil inlet and return pipe 30 is switched to the first oil inlet and return pipe 22 is connected to the fourth oil inlet and return pipe 30 and the second oil inlet and return pipe 23 is connected to the third oil inlet and return pipe 29, so as to drive the piston rod of the hydraulic cylinder 4 to retract, and the piston rod of the hydraulic cylinder 4 drives the first clamping device 12 to reset.
[0043] It should be noted that in this text, the term "including", "comprising" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or further includes elements inherent to such a process, method, article or device.
[0044] In this text, specific examples are used to elaborate on the principle and implementation manner of the present utility model. The description of the above examples is only used to help understand the method and its core idea of the present utility model. The above is only the preferred implementation manner of the present utility model. It should be noted that due to the limitation of literal expression, objectively there are infinite specific structures. For those of ordinary skill in the art in this technical field, without departing from the principle of the present utility model, several improvements, refinements or changes can also be made, or the above technical features can be combined in an appropriate manner; these improvements, refinements, changes or combinations, or directly applying the concept and technical solution of the utility model to other occasions without improvement, should all be regarded as the protection scope of the present utility model.
Claims
1. Precision control hydraulic calibration test device, characterized by: The invention comprises a test chamber (1), wherein a hydraulic cylinder mounting seat (3) is installed on the inner side of the test chamber (1), a hydraulic cylinder (4) is installed on one side of the hydraulic cylinder mounting seat (3), a first connecting rod (5) is sleeved on the outer side of the piston rod of the hydraulic cylinder (4), one end of the first connecting rod (5) is connected to a telescopic rod (6), the telescopic rod (6) passes through the side of the test chamber (1) and is slidably connected thereto, a scale mark (7) is provided on the outer side of the telescopic rod (6), and a second connecting rod (8) is installed on the side of the test chamber (1), and the second connecting rod (8) is sleeved on the outer side of the piston rod of the hydraulic cylinder (4). One end of the connecting rod (8) is connected to the collar (9), a non-contact Hall sensor (10) is installed on the top of the collar (9), an induction magnet (11) is embedded and installed on the top of the telescopic rod (6), a left side plate of the test chamber (1) is penetrated and provided with a movable first clamping device (12), a right side plate of the test chamber (1) is penetrated and provided with a fixed second clamping device (13), a side surface of the first clamping device (12) is connected to the piston rod of the hydraulic cylinder (4), and a hydraulic system is provided on the inner side of the test chamber (1).
2. The precise control hydraulic pressure calibration test device according to claim 1, characterized in that: A chamber door (2) is slidably mounted on the front of the test chamber (1).
3. The precise control hydraulic calibration test device according to claim 1, characterized in that: The first clamping device (12) and the second clamping device (13) both comprise a mounting cover (14), a fixed lower clamping plate (15) being provided on the inner side of the mounting cover (14), a motor (16) being provided on the inner side of the mounting cover (14), an output end of the motor (16) being connected to a screw rod (17), a guide rail (27) being provided inside the mounting cover (14), a transmission slider (18) being slidably installed on the inner side of the guide rail (27), the transmission slider (18) being threadedly connected to the screw rod (17), a side surface of the transmission slider (18) being fixed to an upper clamping plate (19), and a clamping groove (20) being provided on the bottom of the upper clamping plate (19) and the top of the lower clamping plate (15).
4. The precise control hydraulic pressure calibration test device according to claim 1, characterized in that: The hydraulic system comprises a hydraulic oil tank (21), an oil pump (24) is installed on the top of the hydraulic oil tank (21) and is connected to a second oil inlet and return pipe (23), the output end of the oil pump (24) is connected to the first oil inlet and return pipe (22), one end of the second oil inlet and return pipe (23) and the first oil inlet and return pipe (22) are connected to a three-position four-way electromagnetic reversing valve (25), the middle section of the first oil inlet and return pipe (22) is also connected to a linear electromagnetic throttle valve (26), the other end of the three-position four-way electromagnetic reversing valve (25) is respectively connected to a third oil inlet and return pipe (29) and a fourth oil inlet and return pipe (30), and the other ends of the third oil inlet and return pipe (29) and the fourth oil inlet and return pipe (30) are connected to the hydraulic cylinder (4).
5. The precise control hydraulic calibration test device according to claim 1, characterized in that: A display control device (28) is provided on the side of the test chamber (1).
6. The precise control hydraulic pressure calibration test device according to claim 3, characterized in that: An auxiliary guide support slide bar (31) is connected to the side of the mounting cover (14) of the first clamping device (12), a support frame (32) is provided on the inner side of the test chamber (1), and the support slide bar (31) and the support frame (32) are slidably connected.